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Title: Photoemission studies of fluorine functionalized porous graphitic carbon

Abstract

Porous graphitic carbon (PGC) has unique properties desirable for liquid chromatography applications when used as a stationary phase. The polar retention effect on graphite (PREG) allows efficient separation of polar and non-polar solutes. Perfluorinated hydrocarbons however lack polarizabilty and display strong lipo- and hydrophobicity, hence common lipophilic and hydrophilic analytes have low partition coefficiency in fluorinated stationary phases. Attractive interaction between fluorinated stationary phase and fluorinated analytes results in strong retention compared to non-fluorinated analytes. In order to change the selectivities of PGC, it is necessary to develop a bonded PGC stationary phase. In this study, we have synthesized perfluorinated, PGC using hepatadecafluoro-1-iodooctane, under different temperature conditions. Surface functionalization of the raw material was studied using photoelectron spectroscopy (PES). Results indicate the existence of fluorine containing functional groups, -CF, -CF{sub 2} along with an intercalated electron donor species. Multiple oxygen functional groups were also observed, likely due to the presence of oxygen in the starting material. These oxygen species may be responsible for significant modifications to planer and tetrahedral carbon ratios.

Authors:
; ; ; ;  [1]; ;  [2]
  1. Department of Physics, Illinois Institute of Technology, Chicago, Illinois 60616 (United States)
  2. Department of Chemistry and Biochemistry, Brigham Young University, Provo, Utah 84602 (United States)
Publication Date:
OSTI Identifier:
22038877
Resource Type:
Journal Article
Journal Name:
Journal of Applied Physics
Additional Journal Information:
Journal Volume: 111; Journal Issue: 5; Other Information: (c) 2012 American Institute of Physics.; Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0021-8979
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; BINDING ENERGY; ELECTRONS; FLUORINE; GRAPHITE; HYDROCARBONS; LIQUID COLUMN CHROMATOGRAPHY; MODIFICATIONS; PHOTOEMISSION; POLARIZABILITY; POROUS MATERIALS; RAW MATERIALS; RETENTION; SOLUTES; SURFACE TREATMENTS; SURFACES; X-RAY PHOTOELECTRON SPECTROSCOPY

Citation Formats

Ganegoda, Hasitha, Olive, Daniel, Cheng, Lidens, Segre, Carlo U, Terry, Jeff, Jensen, David S, and Linford, Matthew R. Photoemission studies of fluorine functionalized porous graphitic carbon. United States: N. p., 2012. Web. doi:10.1063/1.3691888.
Ganegoda, Hasitha, Olive, Daniel, Cheng, Lidens, Segre, Carlo U, Terry, Jeff, Jensen, David S, & Linford, Matthew R. Photoemission studies of fluorine functionalized porous graphitic carbon. United States. doi:10.1063/1.3691888.
Ganegoda, Hasitha, Olive, Daniel, Cheng, Lidens, Segre, Carlo U, Terry, Jeff, Jensen, David S, and Linford, Matthew R. Thu . "Photoemission studies of fluorine functionalized porous graphitic carbon". United States. doi:10.1063/1.3691888.
@article{osti_22038877,
title = {Photoemission studies of fluorine functionalized porous graphitic carbon},
author = {Ganegoda, Hasitha and Olive, Daniel and Cheng, Lidens and Segre, Carlo U and Terry, Jeff and Jensen, David S and Linford, Matthew R},
abstractNote = {Porous graphitic carbon (PGC) has unique properties desirable for liquid chromatography applications when used as a stationary phase. The polar retention effect on graphite (PREG) allows efficient separation of polar and non-polar solutes. Perfluorinated hydrocarbons however lack polarizabilty and display strong lipo- and hydrophobicity, hence common lipophilic and hydrophilic analytes have low partition coefficiency in fluorinated stationary phases. Attractive interaction between fluorinated stationary phase and fluorinated analytes results in strong retention compared to non-fluorinated analytes. In order to change the selectivities of PGC, it is necessary to develop a bonded PGC stationary phase. In this study, we have synthesized perfluorinated, PGC using hepatadecafluoro-1-iodooctane, under different temperature conditions. Surface functionalization of the raw material was studied using photoelectron spectroscopy (PES). Results indicate the existence of fluorine containing functional groups, -CF, -CF{sub 2} along with an intercalated electron donor species. Multiple oxygen functional groups were also observed, likely due to the presence of oxygen in the starting material. These oxygen species may be responsible for significant modifications to planer and tetrahedral carbon ratios.},
doi = {10.1063/1.3691888},
journal = {Journal of Applied Physics},
issn = {0021-8979},
number = 5,
volume = 111,
place = {United States},
year = {2012},
month = {3}
}